CVE-2026-83711 Microsoft Azure Active Directory B2C Elevation of Privilege Vulnerability
An attacker can bypass authorization controls in Azure AD B2C to elevate privileges over the network.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-83711?
CVE-2026-83711 is a critical authentication bypass vulnerability in Microsoft Entra, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Authorization bypass through user-controlled key in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.
Weakness: CWE-639
Which versions are affected by CVE-2026-83711?
It affects 1 product.
Products include Microsoft Azure Active Directory B2c.
How do I fix CVE-2026-83711?
No fix has been published for CVE-2026-83711 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-83711 being exploited?
There is no known exploitation of CVE-2026-83711 in the wild and no public exploit code.
Sources
Also known as GHSA-w2qf-mqjq-8m33.